diff --git a/Library/Homebrew/formula_auditor.rb b/Library/Homebrew/formula_auditor.rb
index 67d61397ca93b..d8fcd03cb38f3 100644
--- a/Library/Homebrew/formula_auditor.rb
+++ b/Library/Homebrew/formula_auditor.rb
@@ -2,7 +2,6 @@
 # frozen_string_literal: true
 
 require "deprecate_disable"
-require "formula_text_auditor"
 require "formula_versions"
 require "resource_auditor"
 require "utils/shared_audits"
@@ -32,7 +31,7 @@ def initialize(formula, options = {})
       @core_tap = formula.tap&.core_tap? || options[:core_tap]
       @problems = []
       @new_formula_problems = []
-      @text = FormulaTextAuditor.new(formula.path)
+      @text = formula.path.open("rb", &:read)
       @specs = %w[stable head].filter_map { |s| formula.send(s) }
       @spdx_license_data = options[:spdx_license_data]
       @spdx_exception_data = options[:spdx_exception_data]
@@ -510,16 +509,6 @@ def audit_relicensed_formulae
               "It must not be upgraded to version #{relicensed_version} or newer."
     end
 
-    def audit_keg_only_reason
-      return unless @core_tap
-      return unless formula.keg_only?
-
-      keg_only_message = text.to_s.match(/keg_only\s+["'](.*)["']/)&.captures&.first
-      return unless keg_only_message&.include?("HOMEBREW_PREFIX")
-
-      problem "`keg_only` reason should not include `HOMEBREW_PREFIX` as it creates confusing `brew info` output."
-    end
-
     def audit_versioned_keg_only
       return unless @versioned_formula
       return unless @core_tap
diff --git a/Library/Homebrew/formula_text_auditor.rb b/Library/Homebrew/formula_text_auditor.rb
deleted file mode 100644
index 5600b037bff85..0000000000000
--- a/Library/Homebrew/formula_text_auditor.rb
+++ /dev/null
@@ -1,43 +0,0 @@
-# typed: true
-# frozen_string_literal: true
-
-module Homebrew
-  # Auditor for checking common violations in {Formula} text content.
-  class FormulaTextAuditor
-    def initialize(path)
-      @text = path.open("rb", &:read)
-      @lines = @text.lines.to_a
-    end
-
-    def without_patch
-      @text.split("\n__END__").first
-    end
-
-    def trailing_newline?
-      /\Z\n/.match?(@text)
-    end
-
-    def =~(other)
-      other =~ @text
-    end
-
-    def include?(string)
-      @text.include? string
-    end
-
-    sig { returns(String) }
-    def to_s
-      @text
-    end
-
-    def line_number(regex, skip = 0)
-      index = @lines.drop(skip).index { |line| line.match?(regex) }
-      index ? index + 1 : nil
-    end
-
-    def reverse_line_number(regex)
-      index = @lines.reverse.index { |line| line.match?(regex) }
-      index ? @lines.count - index : nil
-    end
-  end
-end
diff --git a/Library/Homebrew/rubocops/text.rb b/Library/Homebrew/rubocops/text.rb
index 56601d0c174ba..3c6113c8b828b 100644
--- a/Library/Homebrew/rubocops/text.rb
+++ b/Library/Homebrew/rubocops/text.rb
@@ -30,8 +30,15 @@ def audit_formula(node, _class_node, _parent_class_node, body_node)
             problem "Formulae should not depend on both OpenSSL and LibreSSL (even optionally)."
           end
 
-          if formula_tap == "homebrew-core" && (depends_on?("veclibfort") || depends_on?("lapack"))
-            problem "Formulae in homebrew/core should use OpenBLAS as the default serial linear algebra library."
+          if formula_tap == "homebrew-core"
+            if depends_on?("veclibfort") || depends_on?("lapack")
+              problem "Formulae in homebrew/core should use OpenBLAS as the default serial linear algebra library."
+            end
+
+            if find_node_method_by_name(body_node, :keg_only)&.source&.include?("HOMEBREW_PREFIX")
+              problem "`keg_only` reason should not include `HOMEBREW_PREFIX` " \
+                      "as it creates confusing `brew info` output."
+            end
           end
 
           unless method_called_ever?(body_node, :go_resource)
diff --git a/Library/Homebrew/test/formula_auditor_spec.rb b/Library/Homebrew/test/formula_auditor_spec.rb
index 930f8bb794850..f8103cda3eb73 100644
--- a/Library/Homebrew/test/formula_auditor_spec.rb
+++ b/Library/Homebrew/test/formula_auditor_spec.rb
@@ -1238,7 +1238,7 @@ class FooAT11 < Formula
 
   describe "#audit_conflicts" do
     before do
-      # We don't really test FormulaTextAuditor here
+      # We don't really test the formula text retrieval here
       allow(File).to receive(:open).and_return("")
     end
 
diff --git a/Library/Homebrew/test/formula_text_auditor_spec.rb b/Library/Homebrew/test/formula_text_auditor_spec.rb
deleted file mode 100644
index b754613b49ddd..0000000000000
--- a/Library/Homebrew/test/formula_text_auditor_spec.rb
+++ /dev/null
@@ -1,39 +0,0 @@
-# frozen_string_literal: true
-
-require "formula_text_auditor"
-
-RSpec.describe Homebrew::FormulaTextAuditor do
-  alias_matcher :have_trailing_newline, :be_trailing_newline
-
-  let(:dir) { mktmpdir }
-
-  def formula_text(name, body = nil)
-    path = dir/"#{name}.rb"
-
-    path.write <<~RUBY
-      class #{Formulary.class_s(name)} < Formula
-        #{body}
-      end
-    RUBY
-
-    described_class.new(path)
-  end
-
-  specify "simple valid Formula" do
-    ft = formula_text "valid", <<~RUBY
-      url "https://www.brew.sh/valid-1.0.tar.gz"
-    RUBY
-
-    expect(ft).to have_trailing_newline
-
-    expect(ft =~ /\burl\b/).to be_truthy
-    expect(ft.line_number(/desc/)).to be_nil
-    expect(ft.line_number(/\burl\b/)).to eq(2)
-    expect(ft).to include("Valid")
-  end
-
-  specify "#trailing_newline?" do
-    ft = formula_text "newline"
-    expect(ft).to have_trailing_newline
-  end
-end