buildsys: remove superfluous default n

kconfig's default defaults to n so spelling out default n is redundant

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

extra/Configs/Config.in

@@ -433,7 +433,6 @@ config LDSO_LD_LIBRARY_PATH
 config LDSO_NO_CLEANUP
 	bool "Disable automatic unloading of dynamically loaded shared objects"
 	depends on HAVE_SHARED
-	default n
 	help
 	  If you need complete allocation traces when debugging memory leaks
 	  using Valgrind in a process that dynamically loads shared objects,
@@ -2106,7 +2105,6 @@ config UCLIBC_HAS_ARC4RANDOM
 config ARC4RANDOM_USES_NODEV
 	bool "Do not use /dev/urandom with arc4random()"
 	depends on UCLIBC_HAS_ARC4RANDOM
-	default n
 	help
 	  Answer Y to use gettimeofday(2) and getpid(2) exclusively for
           arc4random(). This is not a bad idea for a diskless system, but

extra/Configs/Config.in.arch

@@ -149,7 +149,6 @@ config UCLIBC_HAS_SOFT_FLOAT
 config DO_C99_MATH
 	bool "Enable full C99 math library support"
 	depends on UCLIBC_HAS_FLOATS
-	default n
 	help
 	  If you want the uClibc math library to contain the full set C99
 	  math library features, then answer Y.  If you leave this set to
@@ -163,7 +162,6 @@ config DO_C99_MATH
 config DO_XSI_MATH
 	bool "Enable XSI math extensions to the ISO C standard (bessel)"
 	depends on UCLIBC_HAS_FLOATS
-	default n
 	help
 	  X/Open System Interfaces extensions to ISO C math functions
 	  (differential equation functions):
@@ -174,7 +172,6 @@ config DO_XSI_MATH
 config UCLIBC_HAS_FENV
 	bool "Enable C99 Floating-point environment"
 	depends on UCLIBC_HAS_FLOATS
-	default n
 	help
 	  If you want the uClibc math library to contain the C99 floating
 	  point environment, rounding and exception handling functions then