Clean up http-clients build (possible fix for "still shadow jar") (#1…

…2796)

- Remove unused shadowjar plugin and unused method in http-clients build.

On previous builds, a full shadow jar has been published. This update
will potentially "fix" that so we publish only a "shallow jar" instead.
The transitive dependencies from a 'shadow-jar' are not desired.

http-clients/lobby-client/build.gradle

@@ -1,6 +1,5 @@
 plugins {
     id("maven-publish")
-    id "com.github.johnrengelman.shadow" version "8.1.1"
 }
 
 version = System.getenv("JAR_VERSION")
@@ -13,16 +12,6 @@ dependencies {
     testImplementation project(":lib:test-common")
 }
 
-def getGitCommitCount = { ->
-    def stdout = new ByteArrayOutputStream()
-    exec {
-        commandLine "git", "rev-list", "--count", "HEAD"
-        standardOutput = stdout
-    }
-    return stdout.toString().trim()
-}
-
-
 publishing {
     repositories {
         maven {