STYLE: remove unused variables _LINK_LIBS

Modules/Applications/AppChangeDetection/app/CMakeLists.txt

Modules/Applications/AppClassification/app/CMakeLists.txt

Modules/Applications/AppDescriptors/app/CMakeLists.txt

...pplications/AppDimensionalityReduction/app/CMakeLists.txt

Modules/Applications/AppEdge/app/CMakeLists.txt

Modules/Applications/AppFiltering/app/CMakeLists.txt

Modules/Applications/AppFusion/app/CMakeLists.txt

Modules/Applications/AppHyperspectral/app/CMakeLists.txt

Modules/Applications/AppImageUtils/app/CMakeLists.txt

Modules/Applications/AppIndices/app/CMakeLists.txt

Modules/Applications/AppKMZ/app/CMakeLists.txt

Modules/Applications/AppMathParser/app/CMakeLists.txt

Modules/Applications/AppMathParserX/app/CMakeLists.txt

Modules/Applications/AppMoments/app/CMakeLists.txt

Modules/Applications/AppMorphology/app/CMakeLists.txt

...les/Applications/AppOpticalCalibration/app/CMakeLists.txt

Modules/Applications/AppProjection/app/CMakeLists.txt

Modules/Applications/AppSARCalibration/app/CMakeLists.txt

Modules/Applications/AppSARDecompositions/app/CMakeLists.txt

.../Applications/AppSARPolarMatrixConvert/app/CMakeLists.txt