gen_stub: inline single-use ::setTypes() methods

Both `ArgInfo::setTypes()` and `ReturnInfo::setTypes()` were private methods
only called in the applicable class's constructor. They had no special logic
that benefited from existing as a separate method, and just added a level of
indirection. Inline the uses and remove the methods.

Author: DanielEScherzer

build/gen_stub.php

@@ -811,7 +811,8 @@ public function __construct(
         $this->name = $name;
         $this->sendBy = $sendBy;
         $this->isVariadic = $isVariadic;
-        $this->setTypes($type, $phpDocType);
+        $this->type = $type;
+        $this->phpDocType = $phpDocType;
         $this->defaultValue = $defaultValue;
         $this->attributes = $attributes;
     }
@@ -876,12 +877,6 @@ public function getDefaultValueAsMethodSynopsisString(): ?string {
 
         return $this->defaultValue;
     }
-
-    private function setTypes(?Type $type, ?Type $phpDocType): void
-    {
-        $this->type = $type;
-        $this->phpDocType = $phpDocType;
-    }
 }
 
 interface VariableLikeName {
@@ -1137,7 +1132,9 @@ class ReturnInfo {
 
     public function __construct(bool $byRef, ?Type $type, ?Type $phpDocType, bool $tentativeReturnType, ?string $refcount) {
         $this->byRef = $byRef;
-        $this->setTypes($type, $phpDocType, $tentativeReturnType);
+        $this->type = $type;
+        $this->phpDocType = $phpDocType;
+        $this->tentativeReturnType = $tentativeReturnType;
         $this->setRefcount($refcount);
     }
 
@@ -1151,13 +1148,6 @@ public function getMethodSynopsisType(): ?Type {
         return $this->type ?? $this->phpDocType;
     }
 
-    private function setTypes(?Type $type, ?Type $phpDocType, bool $tentativeReturnType): void
-    {
-        $this->type = $type;
-        $this->phpDocType = $phpDocType;
-        $this->tentativeReturnType = $tentativeReturnType;
-    }
-
     private function setRefcount(?string $refcount): void
     {
         $type = $this->phpDocType ?? $this->type;