Remove links for linked libswscale building

libswscale is now built under _build so the links are not needed here.

diff --git a/src/common.mak b/src/common.mak
deleted file mode 120000 (symlink)
index b340400..0000000
--- a/src/common.mak
+++ /dev/null
@@ -1 +0,0 @@
-./ffmpeg/common.mak
\ No newline at end of file

diff --git a/src/config.mak b/src/config.mak
deleted file mode 120000 (symlink)
index eac3a18..0000000
--- a/src/config.mak
+++ /dev/null
@@ -1 +0,0 @@
-./ffmpeg/config.mak
\ No newline at end of file

diff --git a/src/subdir.mak b/src/subdir.mak
deleted file mode 120000 (symlink)
index 2430b88..0000000
--- a/src/subdir.mak
+++ /dev/null
@@ -1 +0,0 @@
-./ffmpeg/subdir.mak
\ No newline at end of file