lstm: Remove unused variable
lstm: Remove unused variable

This fixes a compiler warning:

lstm/input.cpp:141:7: warning: unused variable 'width' [-Wunused-variable]

Signed-off-by: Stefan Weil <8d4c780fcfdc41841e5070f4c43da8958ba6aec0@weilnetz.de>

UB-Mannheim/tesseract,jbarlow83/tesseract,amitdo/tesseract,UB-Mannheim/tesseract,UB-Mannheim/tesseract,stweil/tesseract,amitdo/tesseract,tesseract-ocr/tesseract,jbarlow83/tesseract,amitdo/tesseract,stweil/tesseract,tesseract-ocr/tesseract,tesseract-ocr/tesseract,stweil/tesseract,tesseract-ocr/tesseract,amitdo/tesseract,UB-Mannheim/tesseract,tesseract-ocr/tesseract,stweil/tesseract,jbarlow83/tesseract,amitdo/tesseract,UB-Mannheim/tesseract,jbarlow83/tesseract,stweil/tesseract,jbarlow83/tesseract