Revert "[Fuchsia] Dump syslog output after tests have run (flutter#16561)"

This reverts commit fc936b6.

Author: NoamDev

testing/fuchsia/run_tests.sh

@@ -68,8 +68,3 @@ done
     -f shell_tests-0.far  \
     -t shell_tests \
     -a "--gtest_filter=-ShellTest.HandlesActualIphoneXsInputEvents:ShellTest.CacheSkSLWorks:ShellTest.SetResourceCacheSize*:ShellTest.Screenshot:ShellTest.WaitForFirstFrameTimeout"
-
-echo "Dumping system logs..."
-
-./fuchsia_ctl -d $device_name ssh \
-    -c "log_listener --dump_logs yes"