fix: backend projects not submitting (#38900)

Co-authored-by: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>

client/src/templates/Challenges/redux/index.js

@@ -52,7 +52,6 @@ export const types = createTypes(
     'initTests',
     'initConsole',
     'initLogs',
-    'updateBackendFormValues',
     'updateConsole',
     'updateChallengeMeta',
     'updateFile',
@@ -128,9 +127,6 @@ export const cancelTests = createAction(types.cancelTests);
 
 export const initConsole = createAction(types.initConsole);
 export const initLogs = createAction(types.initLogs);
-export const updateBackendFormValues = createAction(
-  types.updateBackendFormValues
-);
 export const updateChallengeMeta = createAction(types.updateChallengeMeta);
 export const updateFile = createAction(types.updateFile);
 export const updateConsole = createAction(types.updateConsole);
@@ -190,8 +186,6 @@ export const isResetModalOpenSelector = state => state[ns].modal.reset;
 export const isBuildEnabledSelector = state => state[ns].isBuildEnabled;
 export const successMessageSelector = state => state[ns].successMessage;
 
-export const backendFormValuesSelector = state =>
-  state[ns].backendFormValues || {};
 export const projectFormValuesSelector = state =>
   state[ns].projectFormValues || {};
 
@@ -207,7 +201,7 @@ export const challengeDataSelector = state => {
       files: challengeFilesSelector(state)
     };
   } else if (challengeType === challengeTypes.backend) {
-    const { solution: url = {} } = backendFormValuesSelector(state);
+    const { solution: url = {} } = projectFormValuesSelector(state);
     challengeData = {
       ...challengeData,
       url
@@ -329,10 +323,6 @@ export const reducer = handleActions(
       })),
       consoleOut: ''
     }),
-    [types.updateBackendFormValues]: (state, { payload }) => ({
-      ...state,
-      backendFormValues: payload
-    }),
     [types.updateSolutionFormValues]: (state, { payload }) => ({
       ...state,
       projectFormValues: payload