pygamer: Remove broken neopixel examples

These compile, but don't currently work reliably, due to changes in the
HAL changing the timing of the asynchronous serial signals to the WS2812

boards/pygamer/CHANGELOG.md

@@ -1,5 +1,6 @@
 # Unreleased
 
+- remove neopixel support and examples (currently unreliable)
 - update HAL v0.14 -> v0.17 and other dependencies, fix examples
 - update path of Cargo config
 

boards/pygamer/Cargo.toml

@@ -17,7 +17,6 @@ exclude = ["assets"]
 [dependencies]
 cortex-m = {version = "0.7", features = ["critical-section-single-core"]}
 st7735-lcd = "0.8.1"
-ws2812-timer-delay = "0.3"
 
 [dependencies.cortex-m-rt]
 version = "0.7"
@@ -46,7 +45,6 @@ embedded-graphics = "0.7.1"
 embedded-hal-02 = {package = "embedded-hal", version = "0.2", features = ["unproven"]}
 embedded-hal-bus = "0.2.0"
 smart-leds = "0.3"
-ws2812-spi = { version = "0.4.0", features = ["mosi_idle_high"] }
 lis3dh = "0.1.0"
 cortex-m-rtic = "1.0"
 tinybmp = "0.3.1"
@@ -74,10 +72,6 @@ opt-level = 's'
 [package.metadata]
 chip = "ATSAMD51J19A"
 
-[[example]]
-name = "usb_serial"
-required-features = ["usb"]
-
 [[example]]
 name = "usb_poll"
 required-features = ["usb"]
@@ -86,10 +80,6 @@ required-features = ["usb"]
 name = "sd_card"
 required-features = ["sd-card"]
 
-[[example]]
-name = "neopixel_easing"
-required-features = ["math"]
-
 [[example]]
 name = "pwm_tc4"
 required-features = ["math"]