Remove dead icons

targets/f7/api_symbols.csv

@@ -3990,11 +3990,8 @@ Variable,+,I_Percent_10x14,const Icon,
 Variable,+,I_Pin_arrow_up_7x9,const Icon,
 Variable,+,I_Pin_attention_dpad_29x29,const Icon,
 Variable,+,I_Pin_back_arrow_10x8,const Icon,
-Variable,-,I_Pin_cell_13x13,const Icon,
 Variable,+,I_Pin_pointer_5x3,const Icon,
 Variable,+,I_Pin_star_7x7,const Icon,
-Variable,-,I_Play_25x27,const Icon,
-Variable,-,I_Play_hvr_25x27,const Icon,
 Variable,+,I_Pressed_Button_13x13,const Icon,
 Variable,+,I_Quest_7x8,const Icon,
 Variable,+,I_RFIDDolphinReceive_97x61,const Icon,
@@ -4077,13 +4074,6 @@ Variable,+,I_floppydisk_10px,const Icon,
 Variable,+,I_green_19x20,const Icon,
 Variable,+,I_green_hover_19x20,const Icon,
 Variable,+,I_heat_30x51,const Icon,
-Variable,-,I_hourglass0_24x24,const Icon,
-Variable,-,I_hourglass1_24x24,const Icon,
-Variable,-,I_hourglass2_24x24,const Icon,
-Variable,-,I_hourglass3_24x24,const Icon,
-Variable,-,I_hourglass4_24x24,const Icon,
-Variable,-,I_hourglass5_24x24,const Icon,
-Variable,-,I_hourglass6_24x24,const Icon,
 Variable,+,I_iButtonDolphinVerySuccess_92x55,const Icon,
 Variable,+,I_iButtonKey_49x44,const Icon,
 Variable,+,I_ibutt_10px,const Icon,