print edges per second

prints the rate of finished edges per second to the console,
for instance with NINJA_STATUS="[%s/%t %o(%c)/s] ":

[132/1922 16.1(14)/s]

16.1 is the average for all processed files (here 132 since start)
14 is the average of the last n files while n is the number specifies by
-j (or its default)

1 files changed, 0 insertions, 5 deletions

diff --git a/src/util.h b/src/util.h
index 82f4850..b108c25 100644
--- a/src/util.h
+++ b/src/util.h
@@ -53,11 +53,6 @@ int ReadFile(const string& path, string* contents, string* err);
 /// Mark a file descriptor to not be inherited on exec()s.
 void SetCloseOnExec(int fd);
 
-/// Get the current time as relative to some epoch.
-/// Epoch varies between platforms; only useful for measuring elapsed
-/// time.
-int64_t GetTimeMillis();
-
 /// Given a misspelled string and a list of correct spellings, returns
 /// the closest match or NULL if there is no close enough match.
 const char* SpellcheckStringV(const string& text, const vector<const char*>& words);