Remove unused AudioprocFloat with input_aecdump param support

There's some test code associated with this code path that can
be deleted, so this is a first step towards removing it. From what
I can tell, this is never used.

Bug: none
Change-Id: Idfb8a6c58b929c2eedd0cfc7bdc72f5b3862f5bc
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/356481
Reviewed-by: Gustaf Ullberg <gustaf@webrtc.org>
Commit-Queue: Tomas Gunnarsson <tommi@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#42600}

api/test/audioproc_float.cc

@@ -31,14 +31,5 @@ int AudioprocFloat(std::unique_ptr<AudioProcessingBuilder> ap_builder,
                             /*processed_capture_samples=*/nullptr);
 }
 
-int AudioprocFloat(std::unique_ptr<AudioProcessingBuilder> ap_builder,
-                   int argc,
-                   char* argv[],
-                   absl::string_view input_aecdump,
-                   std::vector<float>* processed_capture_samples) {
-  return AudioprocFloatImpl(std::move(ap_builder), argc, argv, input_aecdump,
-                            processed_capture_samples);
-}
-
 }  // namespace test
 }  // namespace webrtc

api/test/audioproc_float.h

@@ -53,18 +53,6 @@ int AudioprocFloat(std::unique_ptr<AudioProcessingBuilder> ap_builder,
                    int argc,
                    char* argv[]);
 
-// Interface for the audio processing simulation utility, which is similar to
-// the one above, but which adds the option of receiving the input as a string
-// and returning the output as an array. The first three arguments fulfill the
-// same purpose as above. Pass the `input_aecdump` to provide the content of an
-// AEC dump file as a string. After the simulation is completed,
-// `processed_capture_samples` will contain the the samples processed on the
-// capture side.
-int AudioprocFloat(std::unique_ptr<AudioProcessingBuilder> ap_builder,
-                   int argc,
-                   char* argv[],
-                   absl::string_view input_aecdump,
-                   std::vector<float>* processed_capture_samples);
 }  // namespace test
 }  // namespace webrtc