Delete leftover generated (?) MF file

de.prob.ui/MF

-Manifest-Version: 1.0
-Bundle-ManifestVersion: 2
-Bundle-Name: ProB Ui Plug-in
-Bundle-SymbolicName: de.prob.ui;singleton:=true
-Bundle-Version: 7.4.2.qualifier
-Require-Bundle: org.eclipse.ui;bundle-version="[3.5.0,4.0.0)",
- org.eclipse.core.runtime;bundle-version="[3.5.0,4.0.0)",
- org.eclipse.core.resources;bundle-version="[3.5.0,4.0.0)",
- org.eclipse.ui.ide;bundle-version="[3.5.0,4.0.0)",
- de.prob.core;bundle-version="[9.4.0,9.5.0)",
- org.eventb.core;bundle-version="[3.0.0,4.0.0)",
- org.eclipse.core.expressions;bundle-version="[3.4.101,4.0.0)",
- org.eclipse.gef;bundle-version="[3.7.0,4.0.0)",
- org.eventb.core.ast;bundle-version="[3.0.0,4.0.0)",
- org.rodinp.core;bundle-version="[1.7.0,1.9.0)"
-Bundle-ActivationPolicy: lazy
-Bundle-Vendor: HHU Düsseldorf STUPS Group
-Bundle-Activator: de.prob.ui.ProbUiPlugin
-Bundle-RequiredExecutionEnvironment: JavaSE-1.8
-Export-Package: de.prob.ui