Revert "sysinfo, procfs: Support memory info partially"

This reverts commit 8f74888f87.

Change-Id: I65530dd8a4e1af2ca47cb02c02f5c54a9b4595a5

kernel/include/syscall.h

@@ -443,22 +443,6 @@ struct rusage {
 	long   ru_nivcsw;
 };
 
-struct sysinfo {
-	long uptime;             /* Seconds since boot */
-	unsigned long loads[3];  /* 1, 5, and 15 minute load averages */
-	unsigned long totalram;  /* Total usable main memory size */
-	unsigned long freeram;   /* Available memory size */
-	unsigned long sharedram; /* Amount of shared memory */
-	unsigned long bufferram; /* Memory used by buffers */
-	unsigned long totalswap; /* Total swap space size */
-	unsigned long freeswap;  /* swap space still available */
-	unsigned short procs;    /* Number of current processes */
-	unsigned long totalhigh; /* Total high memory size */
-	unsigned long freehigh;  /* Available high memory size */
-	unsigned int mem_unit;   /* Memory unit size in bytes */
-	char _f[20-2*sizeof(long)-sizeof(int)]; /* Padding for libc5 */
-};
-
 extern void terminate(int, int);
 
 struct tod_data_s {