[sbase] Drop support for whoami

Remove whoami from BUILD.gn and rules.mk and document the change in
README. Since zircon lacks understanding of users, the utility isn't
useful.

Change-Id: I60571668a32f9d28f97fe49b4c185048f469efb1
diff --git a/BUILD.gn b/BUILD.gn
index 5fd9df7..ff8ebb8 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -109,7 +109,7 @@
     ":uuencode",
     ":wc",
     ":which",
-    ":whoami",
+    # ":whoami",
     ":xargs",
     ":xinstall",
     ":yes",
@@ -319,8 +319,8 @@
 }
 sbase_util("which") {
 }
-sbase_util("whoami") {
-}
+# sbase_util("whoami") {
+# }
 sbase_util("xinstall") {
 }
 sbase_util("yes") {
@@ -647,10 +647,6 @@
     },
 
     {
-      name = "whoami"
-    },
-
-    {
       name = "xargs"
     },
 
diff --git a/README b/README
index 5606eb8..476fba2 100644
--- a/README
+++ b/README
@@ -87,7 +87,6 @@
 0=*|o uuencode        .
 0#*|o wc              .
 0=*|x which           .
-0=*|x whoami          .
 0=*|o xargs           (-p)
 0=*|x yes             .
 
@@ -114,6 +113,7 @@
 0=*|x setsid          .
 0=*|o time            .
 0=*|o uname           .
+0=*|x whoami          .
 
 
 
diff --git a/rules.mk b/rules.mk
index dcefcb6..e540b8b 100644
--- a/rules.mk
+++ b/rules.mk
@@ -26,6 +26,7 @@
     nohup \
     renice \
     setsid \
+    whoami \
 
 SBASE_PROGRAMS := \
     basename \
@@ -103,7 +104,6 @@
     uuencode \
     wc \
     which \
-    whoami \
     xinstall \
     yes \