fix commented out busy cmd

Author: ladyada

src/drivers/Adafruit_UC8151D.cpp

@@ -85,7 +85,7 @@ Adafruit_UC8151D::Adafruit_UC8151D(int width, int height, int8_t DC, int8_t RST,
 void Adafruit_UC8151D::busy_wait(void) {
   if (_busy_pin >= 0) {
     do {
-      // EPD_command(UC8151D_FLG);
+      EPD_command(UC8151D_FLG);
       delay(10);
     } while (!digitalRead(_busy_pin));
   } else {

src/panels/ThinkInk_290_Mono_M06.h

@@ -17,13 +17,8 @@ class ThinkInk_290_Mono_M06 : public Adafruit_UC8151D {
   void begin(thinkinkmode_t mode = THINKINK_MONO) {
     Adafruit_UC8151D::begin(true);
 
-    if (mode == THINKINK_MONO) {
-      setColorBuffer(1, true); // layer 1 uninverted
-      setBlackBuffer(1, true); // only one buffer
-    } else {
-      setColorBuffer(1, true);
-      setBlackBuffer(1, true);
-    }
+    setColorBuffer(1, true); // layer 1 uninverted
+    setBlackBuffer(1, true); // only one buffer
 
     inkmode = mode; // Preserve ink mode for ImageReader or others