Remove unused Plugin::GetFileSize function

src/api/plugin.cpp

@@ -417,13 +417,6 @@ bool Plugin::IsValid(const GameType gameType,
   return false;
 }
 
-uintmax_t Plugin::GetFileSize(std::filesystem::path pluginPath) {
-  if (!std::filesystem::exists(pluginPath))
-    pluginPath += GHOST_FILE_EXTENSION;
-
-  return std::filesystem::file_size(pluginPath);
-}
-
 void Plugin::Load(const std::filesystem::path& path,
                   GameType gameType,
                   bool headerOnly) {

src/api/plugin.h

@@ -88,7 +88,6 @@ public:
   // Validity checks.
   static bool IsValid(const GameType gameType,
                       const std::filesystem::path& pluginPath);
-  static uintmax_t GetFileSize(std::filesystem::path pluginPath);
 
 private:
   void Load(const std::filesystem::path& path,

src/tests/api/internals/plugin_test.h

@@ -465,22 +465,6 @@ TEST_P(
   }
 }
 
-TEST_P(PluginTest, getFileSizeShouldThrowForAMissingPlugin) {
-  EXPECT_THROW(Plugin::GetFileSize(game_.DataPath() / missingEsp),
-               std::filesystem::filesystem_error);
-}
-
-TEST_P(PluginTest, getFileSizeShouldReturnCorrectValueForAPlugin) {
-  EXPECT_EQ(getNonAsciiEspFileSize(),
-            Plugin::GetFileSize(game_.DataPath() /
-                                std::filesystem::u8path(nonAsciiEsp)));
-}
-
-TEST_P(PluginTest, getFileSizeShouldReturnCorrectValueForAGhostedPlugin) {
-  EXPECT_EQ(getGhostedPluginFileSize(),
-            Plugin::GetFileSize(game_.DataPath() / blankMasterDependentEsm));
-}
-
 TEST_P(PluginTest,
        doRecordsOverlapShouldReturnFalseIfTheArgumentIsNotAPluginObject) {
   Plugin plugin1(