Remove unused imports and toString() call

Author: offa

src/main/java/org/jenkinsci/plugins/parameterizedscheduler/ParameterizedCronTabList.java

@@ -45,7 +45,7 @@ public static ParameterizedCronTabList create(String cronTabSpecification, Hash
 					try {
 						result.add(ParameterizedCronTab.create(line, lineNumber, hash, timezone));
 					} catch (ANTLRException e) {
-						throw new ANTLRException(String.format("Invalid input: \"%s\": %s", line, e.toString()), e);
+						throw new ANTLRException(String.format("Invalid input: \"%s\": %s", line, e), e);
 					}
 				}
 			}

src/main/java/org/jenkinsci/plugins/parameterizedscheduler/ParameterizedStaplerRequest.java

@@ -15,7 +15,6 @@
 import javax.servlet.DispatcherType;
 import javax.servlet.RequestDispatcher;
 import javax.servlet.ServletContext;
-import javax.servlet.ServletException;
 import javax.servlet.ServletInputStream;
 import javax.servlet.ServletRequest;
 import javax.servlet.ServletResponse;
@@ -25,8 +24,6 @@
 import javax.servlet.http.HttpUpgradeHandler;
 import javax.servlet.http.Part;
 import java.io.BufferedReader;
-import java.io.IOException;
-import java.io.UnsupportedEncodingException;
 import java.lang.reflect.Type;
 import java.security.Principal;
 import java.util.Calendar;