tests: remove some unnecessary sleeps

tests/test-cat

@@ -9,7 +9,6 b' hg ci -A -m m -d "1000000 0"'
 hg rm a
 hg cat a
 hg cat --decode a # more tests in test-encode
-sleep 1 # make sure mtime is changed
 echo 1 > b
 hg ci -m m -d "1000000 0"
 echo 2 > b

tests/test-keyword

@@ -158,8 +158,7 b' echo % commit'
 hg --debug commit -ma2c -d '1 0' -u 'User Name <[e-mail]>'
 echo % cat a c
 cat a c
-echo % touch copied c after 1 second
-sleep 1
+echo % touch copied c
 touch c
 echo % status
 hg status

tests/test-keyword.out

@@ -230,7 +230,7 b' xxx $'
 expand $Id: c,v e22d299ac0c2 1970/01/01 00:00:01 user $
 do not process $Id:
 xxx $
-% touch copied c after 1 second
+% touch copied c
 % status
 % kwfiles
 a

tests/test-status

@@ -23,7 +23,6 b' cd repo2'
 touch modified removed deleted ignored
 echo "^ignored$" > .hgignore
 hg ci -A -m 'initial checkin' -d "1000000 0"
-sleep 1 # make sure mtime is changed
 touch modified added unknown ignored
 hg add added
 hg remove removed