Fix GH-9183 Get rid of unnecessary PHPDoc param and return type checks (#9203)

Author: kocsismate

build/gen_stub.php

@@ -917,10 +917,6 @@ public function getDefaultValueAsMethodSynopsisString(): ?string {
 
     private function setTypes(?Type $type, ?Type $phpDocType): void
     {
-        if ($phpDocType !== null && Type::equals($type, $phpDocType)) {
-            throw new Exception('PHPDoc param type "' . $phpDocType->__toString() . '" is unnecessary');
-        }
-
         $this->type = $type;
         $this->phpDocType = $phpDocType;
     }
@@ -1166,10 +1162,6 @@ public function getMethodSynopsisType(): ?Type {
 
     private function setTypes(?Type $type, ?Type $phpDocType, bool $tentativeReturnType): void
     {
-        if ($phpDocType !== null && Type::equals($type, $phpDocType)) {
-            throw new Exception('PHPDoc return type "' . $phpDocType->__toString() . '" is unnecessary');
-        }
-
         $this->type = $type;
         $this->phpDocType = $phpDocType;
         $this->tentativeReturnType = $tentativeReturnType;