removed check again as dsa as subkey of rsa is working again

org_apg/res/values/strings.xml

@@ -260,7 +260,6 @@
     <string name="error_wrongPassPhrase">wrong passphrase</string>
     <string name="error_savingKeys">error saving some key(s)</string>
     <string name="error_couldNotExtractPrivateKey">could not extract private key</string>
-    <string name="error_couldNotAddDSASubkey">Master key must be DSA to add DSA subkeys</string>
     
     <!-- progress_lowerCase: lowercase, phrases, usually ending in '…' -->
     <string name="progress_done">done.</string>