fix: remove unused "Merge into" input from /packages

When using this input on `live` as a TU, the field is not
taken into account. Tried with no action and with the
Delete Packages action, which ended up deleting the packages
but not merging into the given target.

So, this commit removes that input from the page.
Signed-off-by: Kevin Morris <kevr@0cost.org>

aurweb/routers/packages.py

@@ -1053,7 +1053,6 @@ PACKAGE_ACTIONS = {}
 async def packages_post(request: Request,
                         IDs: List[int] = Form(default=[]),
                         action: str = Form(default=str()),
-                        merge_into: str = Form(default=str()),
                         confirm: bool = Form(default=False)):
 
     # If an invalid action is specified, just render GET /packages
@@ -1067,8 +1066,7 @@ async def packages_post(request: Request,
     # We deal with `IDs`, `merge_into` and `confirm` arguments
     # within action callbacks.
     callback = PACKAGE_ACTIONS.get(action)
-    retval = await callback(request, package_ids=IDs, merge_into=merge_into,
-                            confirm=confirm)
+    retval = await callback(request, package_ids=IDs, confirm=confirm)
     if retval:  # If *anything* was returned:
         success, messages = retval
         if not success:

templates/partials/packages/search_actions.html

@@ -11,11 +11,6 @@
         <option value="unnotify">{{ "UnNotify" | tr }}</option>
     </select>
 
-    {% if request.user.is_trusted_user() or request.user.is_developer() %}
-        <label for="merge_into">{{ "Merge into" | tr }}</label>
-        <input id="merge_into" type="text" name="merge_into" />
-    {% endif %}
-
     <label class="confirmation">
         <input type="checkbox" name="confirm" />
         {{ "Confirm" | tr }}