Remove -warnings-as-errors for now

Author: aryan-25

.github/workflows/pull_request.yml

@@ -19,8 +19,8 @@ jobs:
             linux_5_8_enabled: false
             linux_5_9_enabled: false
             linux_5_10_enabled: false
-            linux_nightly_6_0_arguments_override: "-Xswiftc -warnings-as-errors --explicit-target-dependency-import-check error"
-            linux_nightly_main_arguments_override: "-Xswiftc -warnings-as-errors --explicit-target-dependency-import-check error"
+            linux_nightly_6_0_arguments_override: "--explicit-target-dependency-import-check error"
+            linux_nightly_main_arguments_override: "--explicit-target-dependency-import-check error"
 
     swift-6-language-mode:
         name: Swift 6 Language Mode