Remove last commit added lines, except for that ones that was present in strings_english.txt but not in strings_spanish.txt (English and Spanish are now sync'd)

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/branches/BRANCH_1_0_0@4474 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9