Remove strError occurences.

libraries/messages.inc.php

@@ -20,16 +20,10 @@ $text_dir = __('ltr');
 
 $strDocu = __('Documentation');
 
-$strError = __('Error');
 $strErrorSaveTable = __('Error saving coordinates for Designer.');
 
 $strFormEmpty = __('Missing value in the form!');
 
-$strHide         = __('Hide');
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-
-
-
 $strLatexContent = __('Content of table __TABLE__');
 $strLatexContinued = __('(continued)');
 $strLatexStructure = __('Structure of table __TABLE__');