[InputMethodNames] Remove unused input method names

These were added in 2017 in https://crrev.com/c/720699, but the
input methods are not implemented yet. Removing these for now so we
only update description and naming for the ones in used.

Bug: None
Change-Id: I80422cf96ceb22f61158e51f68fa41455d4bbfae
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2550334Reviewed-by: Darren Shen <shend@chromium.org>
Commit-Queue: My Nguyen <myy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#830065}

ui/chromeos/ui_chromeos_strings.grd

@@ -1020,15 +1020,9 @@
       <message name="IDS_IME_NAME_KEYBOARD_ETHIOPIC" desc="The input method name shows in system tray menu and settings page.">
         Ethiopic keyboard
       </message>
-      <message name="IDS_IME_NAME_KEYBOARD_GUJARATI_NEW_PHONETIC" desc="The input method name shows in system tray menu and settings page.">
-        Gujarati keyboard (New Phonetic)
-      </message>
       <message name="IDS_IME_NAME_KEYBOARD_GUJARATI_PHONETIC" desc="The input method name shows in system tray menu and settings page.">
         Gujarati Phonetic
       </message>
-      <message name="IDS_IME_NAME_KEYBOARD_HINDI_PHONETIC" desc="The input method name shows in system tray menu and settings page.">
-        Hindi keyboard (Phonetic)
-      </message>
       <message name="IDS_IME_NAME_KEYBOARD_KANNADA_PHONETIC" desc="The input method name shows in system tray menu and settings page.">
         Kannada Phonetic
       </message>
@@ -1041,9 +1035,6 @@
       <message name="IDS_IME_NAME_KEYBOARD_MALAYALAM_PHONETIC" desc="The input method name shows in system tray menu and settings page.">
         Malayalam Phonetic
       </message>
-      <message name="IDS_IME_NAME_KEYBOARD_MARATHI_PHONETIC" desc="The input method name shows in system tray menu and settings page.">
-        Marathi keyboard (Phonetic)
-      </message>
       <message name="IDS_IME_NAME_KEYBOARD_MYANMAR" desc="The input method name shows in system tray menu and settings page.">
         Myanmar keyboard
       </message>