Removed unused exception meesages, now that they are only used in the Mailer level

Author: bbottema

modules/simple-java-mail/src/main/java/org/simplejavamail/mailer/internal/MailerException.java

@@ -7,11 +7,6 @@
  */
 class MailerException extends MailException {
 
-	// FIXME not used anymore?
-	static final String ERROR_READING_SMIME_FROM_INPUTSTREAM = "Was unable to read S/MIME data from input stream";
-	static final String ERROR_READING_FROM_PEM_INPUTSTREAM = "Was unable to convert PEM data to X509 certificate";
-	static final String ERROR_LOADING_PROVIDER_FOR_SMIME_SUPPORT = "Unable to load certificate (missing bouncy castle), is the S/MIME module on the class path?";
-	static final String ERROR_READING_FROM_FILE = "Error reading from file: %s";
 	static final String MISSING_OAUTH2_TOKEN = "TransportStrategy is OAUTH2 but no OAUTH2 token provided as password";
 	static final String INVALID_PROXY_SLL_COMBINATION = "Proxy is not supported for SSL connections (this is a limitation by the underlying JavaMail framework)";
 	static final String ERROR_CONNECTING_SMTP_SERVER = "Was unable to connect to SMTP server";