Remove stale per-panel bring-up test yamls

Superseded by tests/test_pattern_bar_ladder_diagonal.esp32-idf.yaml,
the current standard bench visual check.

tests/test_gxepd2_290c_gdey029f51_native.esp32-idf.yaml

@@ -1,25 +0,0 @@
-esphome:
-  name: gxepd2-test-290c-gdey029f51
-esp32:
-  board: esp32dev
-  framework:
-    type: esp-idf
-external_components:
-  - source:
-      type: local
-      path: ../components
-    components: [gxepd2]
-spi:
-  clk_pin: 18
-  mosi_pin: 23
-logger:
-display:
-  - platform: gxepd2
-    model: GxEPD2_290c_GDEY029F51
-    cs_pin: 5
-    dc_pin: 17
-    reset_pin: 16
-    busy_pin: 4
-    update_interval: 60s
-    lambda: |-
-      it.fill(Color::WHITE);

tests/test_gxepd2_426_gdeq0426t82.esp32-idf.yaml

@@ -1,25 +0,0 @@
-esphome:
-  name: gxepd2-test-426-gdeq0426t82
-esp32:
-  board: esp32dev
-  framework:
-    type: esp-idf
-external_components:
-  - source:
-      type: local
-      path: ../components
-    components: [gxepd2]
-spi:
-  clk_pin: 18
-  mosi_pin: 23
-logger:
-display:
-  - platform: gxepd2
-    model: GxEPD2_426_GDEQ0426T82
-    cs_pin: 5
-    dc_pin: 17
-    reset_pin: 16
-    busy_pin: 4
-    update_interval: 60s
-    lambda: |-
-      it.fill(Color::WHITE);

tests/test_gxepd2_579c_gdey0579f51.esp32-idf.yaml

@@ -1,25 +0,0 @@
-esphome:
-  name: gxepd2-test-579c-gdey0579f51
-esp32:
-  board: esp32dev
-  framework:
-    type: esp-idf
-external_components:
-  - source:
-      type: local
-      path: ../components
-    components: [gxepd2]
-spi:
-  clk_pin: 18
-  mosi_pin: 23
-logger:
-display:
-  - platform: gxepd2
-    model: GxEPD2_579c_GDEY0579F51
-    cs_pin: 5
-    dc_pin: 17
-    reset_pin: 16
-    busy_pin: 4
-    update_interval: 60s
-    lambda: |-
-      it.fill(Color::WHITE);

tests/test_gxepd2_579c_gdey0579f51_master_only.esp32-idf.yaml

@@ -1,25 +0,0 @@
-esphome:
-  name: gxepd2-test-579c-master-only
-esp32:
-  board: esp32dev
-  framework:
-    type: esp-idf
-external_components:
-  - source:
-      type: local
-      path: ../components
-    components: [gxepd2]
-spi:
-  clk_pin: 18
-  mosi_pin: 23
-logger:
-display:
-  - platform: gxepd2
-    model: GxEPD2_579c_GDEY0579F51_MASTER_ONLY
-    cs_pin: 5
-    dc_pin: 17
-    reset_pin: 16
-    busy_pin: 4
-    update_interval: 60s
-    lambda: |-
-      it.fill(Color::WHITE);

tests/test_gxepd2_583_gdeq0583t31.esp32-idf.yaml

@@ -1,25 +0,0 @@
-esphome:
-  name: gxepd2-test-583-gdeq0583t31
-esp32:
-  board: esp32dev
-  framework:
-    type: esp-idf
-external_components:
-  - source:
-      type: local
-      path: ../components
-    components: [gxepd2]
-spi:
-  clk_pin: 18
-  mosi_pin: 23
-logger:
-display:
-  - platform: gxepd2
-    model: GxEPD2_583_GDEQ0583T31
-    cs_pin: 5
-    dc_pin: 17
-    reset_pin: 16
-    busy_pin: 4
-    update_interval: 60s
-    lambda: |-
-      it.fill(Color::WHITE);