Revert "[next] add .action handling for dynamic routes" (#11470)

Reverts vercel/vercel#11461 and #11454  while we revisit the approach to produce fewer rewrites.

packages/next/src/utils.ts

@@ -432,15 +432,6 @@ export async function getDynamicRoutes({
             dest: route.dest?.replace(/($|\?)/, '.rsc$1'),
           });
 
-          routes.push({
-            ...route,
-            src: route.src.replace(
-              new RegExp(escapeStringRegexp('(?:/)?$')),
-              '(?:\\.action)(?:/)?$'
-            ),
-            dest: route.dest?.replace(/($|\?)/, '.action$1'),
-          });
-
           routes.push(route);
         }
 
@@ -1496,7 +1487,6 @@ export type LambdaGroup = {
   isStreaming?: boolean;
   isPrerenders?: boolean;
   isExperimentalPPR?: boolean;
-  isActionPrerender?: boolean;
   isPages?: boolean;
   isApiLambda: boolean;
   pseudoLayer: PseudoLayer;