Bug 1541631 - Part 6: Remove unused action return values. r=jlast

Differential Revision: https://phabricator.services.mozilla.com/D42031

--HG--
extra : moz-landing-system : lando

devtools/client/debugger/src/actions/breakpoints/breakpointPositions.js

@@ -178,8 +178,6 @@ async function _setBreakpointPositions(cx, sourceId, line, thunkArgs) {
     source: source,
     positions,
   });
-
-  return positions;
 }
 
 function generatedSourceActorKey(state, sourceId) {

devtools/client/debugger/src/actions/sources/loadSourceText.js

@@ -124,8 +124,6 @@ async function loadSourceTextPromise(
       await dispatch(addBreakpoint(cx, location, options, disabled));
     }
   }
-
-  return newSource;
 }
 
 export function loadSourceById(cx: Context, sourceId: string) {

devtools/client/debugger/src/actions/sources/symbols.js

@@ -34,8 +34,6 @@ async function doSetSymbols(cx, source, { dispatch, getState, parser }) {
   if (symbols && symbols.framework) {
     dispatch(updateTab(source, symbols.framework));
   }
-
-  return symbols;
 }
 
 type Args = { cx: Context, source: Source };

devtools/client/debugger/src/utils/memoizableAction.js

@@ -11,7 +11,7 @@ type MemoizableActionParams<Args, Result> = {
   hasValue: (args: Args, thunkArgs: ThunkArgs) => boolean,
   getValue: (args: Args, thunkArgs: ThunkArgs) => Result,
   createKey: (args: Args, thunkArgs: ThunkArgs) => string,
-  action: (args: Args, thunkArgs: ThunkArgs) => Promise<Result>,
+  action: (args: Args, thunkArgs: ThunkArgs) => Promise<mixed>,
 };
 
 /*