remove empty line dpkg-gensymbols complains about

debian/apt.symbols

@@ -1256,7 +1256,6 @@ libapt-pkg.so.4.10 libapt-pkg4.10
  (arch=hppa mips mipsel sparc|c++|optional=private)"GlobalError::Insert(GlobalError::MsgType, char const*, void*&, unsigned int&)@Base" 0.8.11.4 1
  (arch=ia64 sparc64|c++|optional=private)"GlobalError::Insert(GlobalError::MsgType, char const*, void*&, unsigned long&)@Base" 0.8.11.4 1
  (arch=sh4|c++|optional=private)"GlobalError::Insert(GlobalError::MsgType, char const*, __builtin_va_list&, unsigned int&)@Base" 0.8.11.4 1
-
  (arch=i386 hurd-i386 kfreebsd-i386|c++|optional=private)"GlobalError::InsertErrno(GlobalError::MsgType, char const*, char const*, char*&, int, unsigned int&)@Base" 0.8.11.4 1
  (arch=armel armhf|c++|optional=private)"GlobalError::InsertErrno(GlobalError::MsgType, char const*, char const*, std::__va_list&, int, unsigned int&)@Base" 0.8.11.4 1
  (arch=alpha|c++|optional=private)"GlobalError::InsertErrno(GlobalError::MsgType, char const*, char const*, __va_list_tag&, int, unsigned long&)@Base" 0.8.11.4 1