Revert "Fix LED pinout for T-Echo board marked v1.0" (#3304)

* Revert "Fix LED pinout for T-Echo board marked v1.0, date 2021-6-28 (#3051)"

This reverts commit c2afa879b8.

* Remove / comment out unused LED pins

variants/t-echo/variant.h

@@ -43,16 +43,12 @@ extern "C" {
 #define NUM_ANALOG_OUTPUTS (0)
 
 // LEDs
-#define PIN_LED1 (0 + 14) // blue (confirmed on boards marked v1.0, date 2021-6-28)
-#define PIN_LED2 (32 + 1) // green
-#define PIN_LED3 (32 + 3) // red
+#define PIN_LED1 (0 + 14) // 13 red (confirmed on 1.0 board)
+// Unused(by firmware) LEDs:
+// #define PIN_LED2 (0 + 15) // 14 blue
+// #define PIN_LED3 (0 + 13) // 15 green
 
-#define LED_RED PIN_LED3
-#define LED_BLUE PIN_LED1
-#define LED_GREEN PIN_LED2
-
-#define LED_BUILTIN LED_BLUE
-#define LED_CONN PIN_GREEN
+#define LED_BUILTIN PIN_LED1
 
 #define LED_STATE_ON 0 // State when LED is lit
 #define LED_INVERTED 1
@@ -232,4 +228,4 @@ External serial flash WP25R1635FZUIL0
  *        Arduino objects - C++ only
  *----------------------------------------------------------------------------*/
 
-#endif
+#endif