Remove Maven prereq.

It's defined in the parent already and is actually bigger than what is
in this pom.xml.

Change-Id: I25fdc6663c864401fe6cc7bbf5253721701dad4e
Signed-off-by: Alexander Kurtakov <akurtako@redhat.com>
diff --git a/pom.xml b/pom.xml
index 23faeed..27769e4 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,9 +6,6 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
 	<modelVersion>4.0.0</modelVersion>
-	<prerequisites>
-		<maven>3.1.1</maven>
-	</prerequisites>
 	<description>A superb shell script editor for Eclipse.</description>
 	<parent>
 		<groupId>org.eclipse.dltk</groupId>