Revert "Add plugin to build jar with all dependencies. Execute 'mvn clean compile assembly:single' from commandline to build such a jar"

This reverts commit 83282cfa4f83156de05599a38a096b032c8814f5.
Revert "Add spotter class for benchmarking."

This reverts commit e8f2c84eca2bc1d2a17aecb3fddbf84cb18ee3b0.