Remove ApplyLoadOrder from API

It just passes through to libloadorder, there's no added value from
having it part of LOOT's API.

include/loot/database_interface.h

@@ -88,13 +88,6 @@ public:
    */
   virtual std::vector<std::string> SortPlugins() = 0;
 
-  /**
-   *  @brief Applies the given load order.
-   *  @param loadOrder
-   *         A vector of plugin filenames in the load order to be set.
-   */
-  virtual void ApplyLoadOrder(const std::vector<std::string>& loadOrder) = 0;
-
   /**
    *  @}
    *  @name Masterlist Update

src/api/api_database.cpp

@@ -102,10 +102,6 @@ std::vector<std::string> ApiDatabase::SortPlugins() {
   return loadOrder;
 }
 
-void ApiDatabase::ApplyLoadOrder(const std::vector<std::string>& loadOrder) {
-  game_.SetLoadOrder(loadOrder);
-}
-
 bool ApiDatabase::UpdateMasterlist(const std::string& masterlistPath,
                                    const std::string& remoteURL,
                                    const std::string& remoteBranch) {

src/api/api_database.h

@@ -45,8 +45,6 @@ struct ApiDatabase : public DatabaseInterface {
 
   std::vector<std::string> SortPlugins();
 
-  void ApplyLoadOrder(const std::vector<std::string>& loadOrder);
-
   bool UpdateMasterlist(const std::string& masterlist_path,
                         const std::string& remote_url,
                         const std::string& remote_branch);

src/tests/api/database_interface_test.h

@@ -176,24 +176,6 @@ TEST_P(DatabaseInterfaceTest, sortPluginsShouldSucceedIfPassedValidArguments) {
   ASSERT_EQ(expectedOrder, actualOrder);
 }
 
-TEST_P(DatabaseInterfaceTest, applyLoadOrderShouldReturnOkIfLoadOrderGivenIsNotEmpty) {
-  std::vector<std::string> loadOrder = {
-    masterFile,
-    blankEsm,
-    blankMasterDependentEsm,
-    blankDifferentEsm,
-    blankDifferentMasterDependentEsm,
-    blankMasterDependentEsp,
-    blankDifferentMasterDependentEsp,
-    blankEsp,
-    blankPluginDependentEsp,
-    blankDifferentEsp,
-    blankDifferentPluginDependentEsp,
-  };
-
-  EXPECT_NO_THROW(db_->ApplyLoadOrder(loadOrder));
-}
-
 TEST_P(DatabaseInterfaceTest, updateMasterlistShouldReturnAnInvalidArgsErrorIfTheMasterlistPathGivenIsInvalid) {
   EXPECT_ANY_THROW(db_->UpdateMasterlist(";//\?", url_, branch_));
 }