Removed unused assets

assets/textures/concrete_building_1/concrete_building_1.png.import

@@ -1,34 +0,0 @@
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-[deps]
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-source_file="res://assets/textures/concrete_building_1/concrete_building_1.png"
-dest_files=["res://.godot/imported/concrete_building_1.png-0e1ef85c387bc0098cd8172e72685d4a.ctex"]
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-[params]
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-compress/lossy_quality=0.7
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-compress/normal_map=0
-compress/channel_pack=0
-mipmaps/generate=true
-mipmaps/limit=-1
-roughness/mode=0
-roughness/src_normal=""
-process/fix_alpha_border=true
-process/premult_alpha=false
-process/normal_map_invert_y=false
-process/hdr_as_srgb=false
-process/hdr_clamp_exposure=false
-process/size_limit=0
-detect_3d/compress_to=0

assets/textures/concrete_building_1/concrete_building_1_lower.png.import

@@ -1,35 +0,0 @@
-[remap]
-
-importer="texture"
-type="CompressedTexture2D"
-uid="uid://cauvebw3slacj"
-path.bptc="res://.godot/imported/concrete_building_1_lower.png-45bbd959e1dd11a9b930268c076a98e3.bptc.ctex"
-metadata={
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-"vram_texture": true
-}
-
-[deps]
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-source_file="res://assets/textures/concrete_building_1/concrete_building_1_lower.png"
-dest_files=["res://.godot/imported/concrete_building_1_lower.png-45bbd959e1dd11a9b930268c076a98e3.bptc.ctex"]
-
-[params]
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-compress/mode=2
-compress/high_quality=true
-compress/lossy_quality=0.7
-compress/hdr_compression=1
-compress/normal_map=0
-compress/channel_pack=0
-mipmaps/generate=true
-mipmaps/limit=-1
-roughness/mode=0
-roughness/src_normal=""
-process/fix_alpha_border=true
-process/premult_alpha=false
-process/normal_map_invert_y=false
-process/hdr_as_srgb=false
-process/hdr_clamp_exposure=false
-process/size_limit=0
-detect_3d/compress_to=0