Convert target platform to simple POM project

There is no reason why this is a plugin project. It is sufficient as
Xtext nature project which is only built via Maven.

Change-Id: I000f61f27aeb5c377fbbb7f452c26b0d0bff0ae0
Signed-off-by: Michael Keppler <Michael.Keppler@gmx.de>

org.eclipse.jgit.packaging/org.eclipse.jgit.target/.classpath

@@ -1,7 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<classpath>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
-	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
-	<classpathentry kind="src" path="src"/>
-	<classpathentry kind="output" path="bin"/>
-</classpath>

org.eclipse.jgit.packaging/org.eclipse.jgit.target/.project

@@ -10,14 +10,8 @@
 			<arguments>
 			</arguments>
 		</buildCommand>
-		<buildCommand>
-			<name>org.eclipse.pde.ManifestBuilder</name>
-			<arguments>
-			</arguments>
-		</buildCommand>
 	</buildSpec>
 	<natures>
-		<nature>org.eclipse.pde.PluginNature</nature>
 		<nature>org.eclipse.xtext.ui.shared.xtextNature</nature>
 	</natures>
 </projectDescription>

org.eclipse.jgit.packaging/org.eclipse.jgit.target/META-INF/MANIFEST.MF

@@ -1,5 +0,0 @@
-Manifest-Version: 1.0
-Bundle-ManifestVersion: 2
-Bundle-Name: JGit Target Platform Bundle
-Bundle-SymbolicName: org.eclipse.jgit.target
-Bundle-Version: 5.4.0.qualifier

org.eclipse.jgit.packaging/org.eclipse.jgit.target/build.properties

@@ -1,4 +0,0 @@
-source.. = src/
-output.. = bin/
-bin.includes = META-INF/,\
-               .