Revert yarnrc upgrade changes

Author: EpicWolverine

.yarnrc.yml

@@ -1,6 +1,6 @@
-compressionLevel: mixed
+# compressionLevel: mixed
 
-enableGlobalCache: false
+# enableGlobalCache: false
 
 nodeLinker: node-modules
 packageExtensions:
@@ -13,4 +13,4 @@ packageExtensions:
       '@babel/plugin-transform-react-jsx':
         optional: true
 
-yarnPath: .yarn/releases/yarn-4.5.1.cjs
+# yarnPath: .yarn/releases/yarn-4.5.1.cjs