Revert "Merge branch 'pr/446' into 420"

This reverts commit 761dc48b3e, reversing
changes made to 91f037c63f.

lib/misc.scons

@@ -3,7 +3,6 @@ Import("env")
 env.Append(
     CPPPATH=[
         "#/lib/digital_signal",
-        "#/lib/pulse_reader",
         "#/lib/fnv1a_hash",
         "#/lib/heatshrink",
         "#/lib/micro-ecc",
@@ -26,7 +25,6 @@ sources = []
 
 libs_recurse = [
     "digital_signal",
-    "pulse_reader",
     "micro-ecc",
     "one_wire",
     "u8g2",