remove generated diagrams

trainbenchmark/diagrams/.gitignore

...nchmark/diagrams/recent/benchmark/inject/Check-inject.pdf

...iagrams/recent/benchmark/inject/Read-and-Check-inject.pdf

...enchmark/diagrams/recent/benchmark/inject/Read-inject.pdf

...hmark/diagrams/recent/benchmark/inject/Recheck-inject.pdf

...nt/benchmark/inject/Transformation-and-Recheck-inject.pdf

...iagrams/recent/benchmark/inject/Transformation-inject.pdf

...nchmark/diagrams/recent/benchmark/repair/Check-repair.pdf

...iagrams/recent/benchmark/repair/Read-and-Check-repair.pdf

...enchmark/diagrams/recent/benchmark/repair/Read-repair.pdf

...hmark/diagrams/recent/benchmark/repair/Recheck-repair.pdf

...nt/benchmark/repair/Transformation-and-Recheck-repair.pdf

...iagrams/recent/benchmark/repair/Transformation-repair.pdf

...diagrams/recent/inject/Check-ConnectedSegments-inject.pdf

...nchmark/diagrams/recent/inject/Check-PosLength-inject.pdf

...hmark/diagrams/recent/inject/Check-RouteSensor-inject.pdf

...diagrams/recent/inject/Check-SemaphoreNeighbor-inject.pdf

...k/diagrams/recent/inject/Check-SwitchMonitored-inject.pdf

...nchmark/diagrams/recent/inject/Check-SwitchSet-inject.pdf

.../diagrams/recent/inject/Read-ConnectedSegments-inject.pdf