chore(env): remove custom coverage exclusions and analytics config

Author: mrz1836

.github/.env.custom

@@ -17,15 +17,6 @@
 #
 # ================================================================================================
 
-# Custom Coverage Exclusions
-GO_COVERAGE_EXCLUDE_PATHS=test/,vendor/,testdata/,examples/,plans/,docs/
-
-# Skip URL Checks in Coverage Reports (true/false)
-GO_COVERAGE_SKIP_URL_CHECKS=true
-
-# Google Analytics Configuration (for coverage pages)
-# GOOGLE_ANALYTICS_ID=
-
 # Provider
 GO_COVERAGE_PROVIDER=codecov