Drop support for armhf

Apart from the roboRIO, which as its own compiler, we don't have any 32
bit ARM chips anymore, and don't intend to add any new ones.  Drop
support to make it easier to build lapack

Change-Id: Icde628dece9b6696235ab4807de1ada4b057981e
Signed-off-by: Austin Schuh <austin.linux@gmail.com>
diff --git a/tools/build_rules/select.bzl b/tools/build_rules/select.bzl
index 5d78a2b..af18e38 100644
--- a/tools/build_rules/select.bzl
+++ b/tools/build_rules/select.bzl
@@ -6,7 +6,6 @@
 all_cpus = [
     "amd64",
     "roborio",
-    "armhf",
     "arm64",
     "cortex-m",
     "cortex-m0plus",
@@ -18,9 +17,9 @@
 
 Args:
   values: A mapping from architecture names (as strings) to other things.
-          Currently amd64, roborio, armhf, and cortex are recognized.
+          Currently amd64, roborio, and cortex are recognized.
           'else' is also allowed as a default.
-          'arm' is allowed instead of roborio, armhf, and cortex.
+          'arm' is allowed instead of roborio, and cortex.
 Returns a select which evaluates to the correct element of values.
 """
 
@@ -30,7 +29,6 @@
         for cpu in values:
             if cpu != "arm":
                 new_values[cpu] = values[cpu]
-        new_values["armhf"] = values["arm"]
         new_values["arm64"] = values["arm"]
         new_values["roborio"] = values["arm"]
         new_values["cortex-m"] = values["arm"]
@@ -43,7 +41,6 @@
         for cpu in values:
             if cpu != "arm32":
                 new_values[cpu] = values[cpu]
-        new_values["armhf"] = values["arm32"]
         new_values["roborio"] = values["arm32"]
         new_values["cortex-m"] = values["arm32"]
         new_values["cortex-m0plus"] = values["arm32"]
@@ -60,7 +57,6 @@
     return select({
         "@//tools:cpu_k8": values["amd64"],
         "@//tools:cpu_roborio": values["roborio"],
-        "@//tools:cpu_armhf": values["armhf"],
         "@//tools:cpu_arm64": values["arm64"],
         "@//tools:cpu_cortex_m4f": values["cortex-m"],
         "@//tools:cpu_cortex_m0plus": values["cortex-m0plus"],
@@ -84,7 +80,6 @@
         "@//tools:cpu_k8": values["64"],
         "@//tools:cpu_arm64": values["64"],
         "@//tools:cpu_roborio": values["32"],
-        "@//tools:cpu_armhf": values["32"],
         "@//tools:cpu_cortex_m4f": values["32"],
         "@//tools:cpu_cortex_m0plus": values["32"],
         # TODO(phil): Support this properly.