Merge pull request #28678 from omrope79:caffe-importer-cleanup

Caffe importer cleanup #28678

Merge with: https://github.com/opencv/opencv_extra/pull/1324

### Pull Request Readiness Checklist

See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request

- [x] I agree to contribute to the project under Apache 2 License.
- [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
- [x] The PR is proposed to the proper branch
- [x] There is a reference to the original bug report and related work
- [x] There is accuracy test, performance test and test data in opencv_extra repository, if applicable
- [x] The feature is well documented and sample code can be built with the project CMake

modules/dnn/misc/objc/gen_dict.json

@@ -1,8 +1,6 @@
 {
     "func_arg_fix" : {
         "Dnn": {
-            "(Net*)readNetFromCaffe:(NSString*)prototxt caffeModel:(NSString*)caffeModel engine:(int)engine" : { "readNetFromCaffe" : {"name" : "readNetFromCaffeFile"} },
-            "(Net*)readNetFromCaffe:(ByteVector*)bufferProto bufferModel:(ByteVector*)bufferModel engine:(int)engine" : { "readNetFromCaffe" : {"name" : "readNetFromCaffeBuffer"} },
             "(Net*)readNetFromONNX:(NSString*)onnxFile engine:(int)engine" : { "readNetFromONNX" : {"name" : "readNetFromONNXFile"} },
             "(Net*)readNetFromONNX:(ByteVector*)buffer engine:(int)engine" : { "readNetFromONNX" : {"name" : "readNetFromONNXBuffer"} },
             "(Net*)readNetFromTensorflow:(NSString*)model config:(NSString*)config engine:(int)engine extraOutputs:(NSArray<NSString*>*)extraOutputs" : { "readNetFromTensorflow" : {"name" : "readNetFromTensorflowFile"} },