diff --git a/browser/config/mozconfigs/win32/debug b/browser/config/mozconfigs/win32/debug
index 1ae4e6f1bc4..426f7520d33 100644
--- a/browser/config/mozconfigs/win32/debug
+++ b/browser/config/mozconfigs/win32/debug
@@ -5,5 +5,3 @@ ac_add_options --enable-trace-malloc
 export MOZILLA_OFFICIAL=1
 
 mk_add_options MOZ_MAKE_FLAGS=-j1
-
-. $topsrcdir/browser/config/mozconfigs/win32/vs2010-mozconfig
diff --git a/browser/config/mozconfigs/win32/l10n-mozconfig b/browser/config/mozconfigs/win32/l10n-mozconfig
index 28c83ebb29c..83b172f8e61 100644
--- a/browser/config/mozconfigs/win32/l10n-mozconfig
+++ b/browser/config/mozconfigs/win32/l10n-mozconfig
@@ -2,5 +2,3 @@ ac_add_options --enable-update-channel=${MOZ_UPDATE_CHANNEL}
 ac_add_options --enable-update-packaging
 ac_add_options --enable-official-branding
 ac_add_options --with-l10n-base=../../l10n-central
-
-. $topsrcdir/browser/config/mozconfigs/win32/vs2010-mozconfig
diff --git a/browser/config/mozconfigs/win32/nightly b/browser/config/mozconfigs/win32/nightly
index 06767f1154c..bb30fa7dcad 100644
--- a/browser/config/mozconfigs/win32/nightly
+++ b/browser/config/mozconfigs/win32/nightly
@@ -14,5 +14,3 @@ export MOZILLA_OFFICIAL=1
 export MOZ_TELEMETRY_REPORTING=1
 
 mk_add_options MOZ_MAKE_FLAGS=-j1
-
-. $topsrcdir/browser/config/mozconfigs/win32/vs2010-mozconfig
diff --git a/browser/config/mozconfigs/win32/release b/browser/config/mozconfigs/win32/release
index 8eaef63be49..e515b9ee190 100644
--- a/browser/config/mozconfigs/win32/release
+++ b/browser/config/mozconfigs/win32/release
@@ -11,5 +11,3 @@ ac_add_options --enable-official-branding
 export MOZILLA_OFFICIAL=1
 
 export MOZ_TELEMETRY_REPORTING=1
-
-. $topsrcdir/browser/config/mozconfigs/win32/vs2010-mozconfig