Remove an unused variable and explicitly initialize some bools to false

Signed-off-by: Daniel Edwards <dev@danieledwards.de>

Code/Editor/EditorPreferencesPageAWS.cpp

@@ -101,7 +101,7 @@ void CEditorPreferencesPage_AWS::SaveSettingsRegistryFile()
                 return;
             }
 
-            [[maybe_unused]] bool saved{};
+            [[maybe_unused]] bool saved = false;
             constexpr auto configurationMode =
                 AZ::IO::SystemFile::SF_OPEN_CREATE | AZ::IO::SystemFile::SF_OPEN_CREATE_PATH | AZ::IO::SystemFile::SF_OPEN_WRITE_ONLY;
             if (AZ::IO::SystemFile outputFile; outputFile.Open(resolvedPath.data(), configurationMode))

Code/Editor/Objects/EntityObject.cpp

@@ -499,14 +499,12 @@ void CEntityObject::AdjustLightProperties(CVarBlockPtr& properties, const char*
         pAreaLight->SetHumanName("PlanarLight");
     }
 
-    bool bCastShadowLegacy = false;  // Backward compatibility for existing shadow casting lights
     if (IVariable* pCastShadowVarLegacy = FindVariableInSubBlock(properties, pSubBlockVar, "bCastShadow"))
     {
         pCastShadowVarLegacy->SetFlags(pCastShadowVarLegacy->GetFlags() | IVariable::UI_INVISIBLE);
         const QString zeroPrefix("0");
         if (!pCastShadowVarLegacy->GetDisplayValue().startsWith(zeroPrefix))
         {
-            bCastShadowLegacy = true;
             pCastShadowVarLegacy->SetDisplayValue(zeroPrefix);
         }
     }

Code/Editor/Settings.cpp

@@ -1084,7 +1084,7 @@ void SEditorSettings::SaveSettingsRegistryFile()
         return;
     }
 
-    [[maybe_unused]] bool saved{};
+    [[maybe_unused]] bool saved = false;
     constexpr auto configurationMode = AZ::IO::SystemFile::SF_OPEN_CREATE
         | AZ::IO::SystemFile::SF_OPEN_CREATE_PATH
         | AZ::IO::SystemFile::SF_OPEN_WRITE_ONLY;

Gems/AWSCore/Code/Source/Editor/Attribution/AWSCoreAttributionManager.cpp

@@ -223,7 +223,7 @@ namespace AWSCore
                     return;
                 }
 
-                [[maybe_unused]] bool saved {};
+                [[maybe_unused]] bool saved = false;
                 constexpr auto configurationMode =
                     AZ::IO::SystemFile::SF_OPEN_CREATE | AZ::IO::SystemFile::SF_OPEN_CREATE_PATH | AZ::IO::SystemFile::SF_OPEN_WRITE_ONLY;
                 if (AZ::IO::SystemFile outputFile; outputFile.Open(resolvedPathAWSPreference.c_str(), configurationMode))