fix(util): remove placeholder OsCreateDirectory

src/util/Filesystem.cpp

@@ -2,10 +2,6 @@
 #include <cstring>
 #include <storm/String.hpp>
 
-void OsCreateDirectory(const char* pathName, int32_t recursive) {
-    // TODO
-}
-
 void OsBuildFontFilePath(const char* fileName, char* buffer, size_t size) {
     SStrPrintf(buffer, size, "%s\\%s", "Fonts", fileName);
 }

src/util/Filesystem.hpp

@@ -4,8 +4,6 @@
 #include <cstddef>
 #include <cstdint>
 
-void OsCreateDirectory(const char*, int32_t);
-
 void OsBuildFontFilePath(const char*, char*, size_t);
 
 char* OsPathFindExtensionWithDot(char*);