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Support for report_java_assert is no longer needed.
This CL removes it.
In addition, this CL removes BuildHooks.java as
report_java_assert is the only thing BuildHooks.java
is used for.


Bug: 1024346
Change-Id: I0235718b771d717f258575ab005acdb261612c99
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2123316
Commit-Queue: Henry Jian <hzjian@google.com>
Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Reviewed-by: Sam Maier <smaier@chromium.org>
Cr-Commit-Position: refs/heads/master@{#755062}