Drop convert_graphdef_memmapped_format

[wasertech]

Since TF droped protobuf support, it seems we don't need this anymore. Thoughts?

STT/Dockerfile.train

Lines 65 to 67 in 49beaf5

	# Tool to convert output graph for inference
	RUN curl -L https://github.com/coqui-ai/STT/releases/download/v0.9.3/convert_graphdef_memmapped_format.linux.amd64.zip | funzip > convert_graphdef_memmapped_format && \
	chmod +x convert_graphdef_memmapped_format

[wasertech]

Yes as I expected... I'll remove it soon.
If for some reason, you still need it, you can download it by using the following command:

# Download and extract convert_graphdef_memmapped_format
curl -L https://github.com/coqui-ai/STT/releases/download/v0.9.3/convert_graphdef_memmapped_format.linux.amd64.zip | funzip > convert_graphdef_memmapped_format

# Make it executable
chmod +x convert_graphdef_memmapped_format