Removed unused strings from strings.xml

[vanshikaarora]

REmoved strings with no default values from strings.xml

Fixes #2655 Fix warnings about string resources 'without required default value'

Changes made

Removed various strings from:

• values-ab/strings.xml
• values-af/strings.xml
• values-ar/strings.xml
• values-ast/strings.xml

[maskaravivek]

@vanshikaarora How did you do it? Did you manually delete the strings? I was wondering if there would be a easier way

[vanshikaarora]

@maskaravivek I wasn't able to reproduce this error.
Also, since the number of strings were less, I have deleted them manually.

I was wondering if there would be a easier way

Do you have some other suggestion?

[maskaravivek]

Trying out an alternative in #2685. Let's see if build succeeds.

[domdomegg]

Tested 2.10.1-debug-string_default_value~0f06b5e3a

[codecov-io]

Codecov Report

Merging #2684 into master will decrease coverage by 0.2%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master   #2684      +/-   ##
=========================================
- Coverage    2.81%   2.61%   -0.21%     
=========================================
  Files         258     268      +10     
  Lines       12376   13369     +993     
  Branches     1111    1276     +165     
=========================================
  Hits          349     349              
- Misses      12001   12994     +993     
  Partials       26      26

Impacted Files	Coverage Δ
...n/java/fr/free/nrw/commons/MediaDataExtractor.java	0% <0%> (ø)	⬆️
...free/nrw/commons/theme/NavigationBaseActivity.java	0% <0%> (ø)	⬆️
...rw/commons/mwapi/ApacheHttpClientMediaWikiApi.java	0% <0%> (ø)	⬆️
...java/fr/free/nrw/commons/upload/UploadService.java	0% <0%> (ø)	⬆️
...fr/free/nrw/commons/media/MediaDetailFragment.java	0% <0%> (ø)	⬆️
.../fr/free/nrw/commons/di/ActivityBuilderModule.java	0% <0%> (ø)	⬆️
...in/java/fr/free/nrw/commons/delete/DeleteTask.java	0% <0%> (ø)	⬆️
.../fr/free/nrw/commons/di/FragmentBuilderModule.java	0% <0%> (ø)	⬆️
...r/free/nrw/commons/review/ReviewImageFragment.java	0% <0%> (ø)
...free/nrw/commons/utils/MediaDataExtractorUtil.java	0% <0%> (ø)
... and 8 more

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