Revert "[nobug] update .gitignore for default output folders"

This reverts commit 8c2d491ce23fb0292c1cdaad171829ec22c27b63.

See bug 454097: EGit adds wrong .gitignore files/entries at project root
diff --git a/ant/org.eclipse.ant.core/.gitignore b/ant/org.eclipse.ant.core/.gitignore
index b5d3a3b..64e92eb 100644
--- a/ant/org.eclipse.ant.core/.gitignore
+++ b/ant/org.eclipse.ant.core/.gitignore
@@ -1,5 +1,4 @@
 lib
 temp.folder
 antsupport.jar
-src_ant_bin
-/bin/
+src_ant_bin
\ No newline at end of file
diff --git a/ant/org.eclipse.ant.launching/.gitignore b/ant/org.eclipse.ant.launching/.gitignore
index f66b0d3..3d07972 100644
--- a/ant/org.eclipse.ant.launching/.gitignore
+++ b/ant/org.eclipse.ant.launching/.gitignore
@@ -3,4 +3,3 @@
 loggers_bin
 common_bin
 remote_bin
-/bin/
diff --git a/ant/org.eclipse.ant.tests.core/.gitignore b/ant/org.eclipse.ant.tests.core/.gitignore
index 16837e4..3c61b5f 100644
--- a/ant/org.eclipse.ant.tests.core/.gitignore
+++ b/ant/org.eclipse.ant.tests.core/.gitignore
@@ -1,3 +1,2 @@
 lib
-test_support_bin
-/bin/
+test_support_bin
\ No newline at end of file
diff --git a/ant/org.eclipse.ant.tests.ui/.gitignore b/ant/org.eclipse.ant.tests.ui/.gitignore
index 16837e4..3c61b5f 100644
--- a/ant/org.eclipse.ant.tests.ui/.gitignore
+++ b/ant/org.eclipse.ant.tests.ui/.gitignore
@@ -1,3 +1,2 @@
 lib
-test_support_bin
-/bin/
+test_support_bin
\ No newline at end of file
diff --git a/ant/org.eclipse.ant.ui/.gitignore b/ant/org.eclipse.ant.ui/.gitignore
index 2116cf7..1f570d2 100644
--- a/ant/org.eclipse.ant.ui/.gitignore
+++ b/ant/org.eclipse.ant.ui/.gitignore
@@ -3,5 +3,4 @@
 antui.jar
 ant_runner_support_bin
 common_ant_support_bin
-remote_support_bin
-/bin/
+remote_support_bin
\ No newline at end of file