Remove the unused linker reference to the maths library.

Demo/CORTEX_M4_ATSAM4S_AVR_Studio/RTOSDemo.cproj

@@ -351,11 +351,6 @@
   <armgcc.compiler.optimization.DebugLevel>Maximum (-g3)</armgcc.compiler.optimization.DebugLevel>
   <armgcc.compiler.warnings.AllWarnings>True</armgcc.compiler.warnings.AllWarnings>
   <armgcc.compiler.miscellaneous.OtherFlags>-pipe -Wall -Wextra -std=gnu99 -ffunction-sections -fdata-sections --param max-inline-insns-single=500 -Dprintf=iprintf</armgcc.compiler.miscellaneous.OtherFlags>
-  <armgcc.linker.libraries.Libraries>
-    <ListValues>
-      <Value>arm_cortexM4l_math</Value>
-    </ListValues>
-  </armgcc.linker.libraries.Libraries>
   <armgcc.linker.libraries.LibrarySearchPaths>
     <ListValues>
       <Value>../src/asf/thirdparty/CMSIS/Lib/GCC</Value>