Revert "Update libsoqt4-dev dependency to ensure libcoin80 is used."

This reverts commit 9be0cda6.

debian/control

@@ -11,7 +11,7 @@ Build-Depends: debhelper (>= 9),
                libopencv-dev [!any-sparc64 !x32],
                liblapack-dev,
                libcoin80-dev | libcoin60-dev,
-               libsoqt4-dev (>= 1.5.0-2.1),
+               libsoqt4-dev,
                libogre-1.9-dev [!any-sh4] | libogre-1.8-dev [!any-sh4] | libogre-dev [!any-sh4],
                libdc1394-22-dev [linux-any],
                libxml2-dev,
@@ -41,7 +41,7 @@ Section: libdevel
 Depends: libopencv-dev [!any-sparc64 !x32],
          liblapack-dev,
          libcoin80-dev | libcoin60-dev,
-         libsoqt4-dev (>= 1.5.0-2.1),
+         libsoqt4-dev,
          libogre-1.9-dev [!any-sh4] | libogre-1.8-dev [!any-sh4] | libogre-dev [!any-sh4],
          libdc1394-22-dev [linux-any],
          libxml2-dev,